Using a Two-Way Between-Subjects ANOVA with Factor a (Gender: Male,female)and $\times$

Using a two-way between-subjects ANOVA with Factor A (Gender: male,female) and Factor B (Type of employment: blue collar,white collar) ,a researcher found that scores for men and women significantly varied across the levels of the second factor (type of employment) .In this study,the researcher found a significant

A) main effect of Factor A
B) main effect of Factor B
C) A $\times$ B interaction
D) post hoc test